diff --git a/src/ragas/testset/synthesizers/multi_hop/base.py b/src/ragas/testset/synthesizers/multi_hop/base.py
index ecccb6c33..48b72ba7c 100644
--- a/src/ragas/testset/synthesizers/multi_hop/base.py
+++ b/src/ragas/testset/synthesizers/multi_hop/base.py
@@ -161,7 +161,7 @@ async def _generate_sample(
         self, scenario: Scenario, callbacks: Callbacks
     ) -> SingleTurnSample:
         if not isinstance(scenario, MultiHopScenario):
-            logger.warning('scenario type should be MultiHopScenario')
+            raise TypeError('scenario type should be MultiHopScenario')
         reference_context = self.make_contexts(scenario)
         prompt_input = QueryConditions(
             persona=scenario.persona,
diff --git a/src/ragas/testset/synthesizers/single_hop/base.py b/src/ragas/testset/synthesizers/single_hop/base.py
index 6ab0c4412..3a60a6dbc 100644
--- a/src/ragas/testset/synthesizers/single_hop/base.py
+++ b/src/ragas/testset/synthesizers/single_hop/base.py
@@ -122,7 +122,7 @@ async def _generate_sample(
         self, scenario: Scenario, callbacks: Callbacks
     ) -> SingleTurnSample:
         if not isinstance(scenario, SingleHopScenario):
-            logger.warning('scenario type should be SingleHopScenario')
+            raise TypeError('scenario type should be SingleHopScenario')
         reference_context = scenario.nodes[0].properties.get("page_content", "")
         prompt_input = QueryCondition(
             persona=scenario.persona,